3(x的平方)+6x+3=93(x的平方+2x+1)=93乘以(x+1)的平方=9(x+1)的平方=3(x+1)=正负根3x1: x= - 根3-1x2: x= 根3-1_满意就请采纳,顶刮刮!谢谢!_
3x^2+6x+3=93x^2+6x-6=0x^2+2x-2=0(x+1)^2=2+1=3x+1=(+/-)根号3X1=-1+根号3X2=-1-根号3
